39 results about "Bright star" patented technology

An automatic telescope (10) capable of determining an orientation without requiring input from a user or any external source. The telescope (10) preferably includes a database (22) to store astronomical information, a processor (24) to control a drive mechanism (18), a vision device (30) to sense bright stars, and a motion sensor (32) to generate a motion signal. When the vision device (30) is slewed from alignment with a first bright star to a second bright star, the motion signal is preferably representative of a measured angle between the first and second bright stars. This process is preferably repeated for several bright stars to generate several measured angles. The processor (24) can then use the measured angles to identify the bright stars and determine the orientation of the telescope (10).

A construction method of a star database of a triangle matching-type star sensor includes steps of: S1) determining basic cut-off magnitude and candidate cut-off magnitude; S2) rejecting peculiar stars; S3) performing fixed star proper motion compensation algorithm; S4) determining threshold of angular distances of neighboring fixed stars; S5) performing whole-celestial sphere helical line traversal; S6) determining relative bright stars; and S7) generating database of angular distances between stars.

A system and method for exposing different parts of a single field of view for various and differing lengths of time while capturing an image is provided. For astrophotography, unwanted light pollution or over-saturation bleeding from nearby or obtrusive stars may be greatly reduced or eliminated while still capturing the image of the nearby brighter star in the same field of view. Also, a system and method for real-time contrast control while capturing an image to optimize signal-to-noise ratio for various parts of the captured image, is provided. An embodiment of the present invention provides such techniques by using spatial light modulator devices, such as a digital micro-mirror device, to controllably mask different portions of light from an image that expose film or a charge-coupled device. A system and method for a way to use a spatial light modulator device as an active and controllable mask for photolithography, is provided.

The invention relates to an automatic faint star recognition method based on perimeter features. The method comprises the following steps that 1, a navigation star catalogue is constructed by adopting a magnitude threshold method according to a fundamental star catalogue, a whole celestial sphere is divided into a plurality of partial overlapped celestial areas by adopting an overlapping ball moment method, two brightest stars in each overlapped celestial area are found to serve as a main star pair, other stars construct a triangular perimeter feature library by serving as auxiliary stars, hash functions are constructed for the generated feature library according to the perimeter size, and fragmentation is conducted; 2, the navigation star catalogue and a navigation feature library are read, star atlas extracting results are sorted in a descending order according to the gray value size, the two brightest stars in each celestial area are taken as the main star pair, the other stars are taken as the auxiliary stars, an observation triangle taking each main star pair as a common side is constructed, and the perimeter of the triangles and the length of the two sides of each triangle taking the corresponding main star pair as the common side are calculated. According to the method, the number of the feature triangles is greatly decreased, and compared with a traditional triangle recognition algorithm based on an angular distance between the stars, the angular distance comparison frequency is decreased, and the recognition speed is increased.

A technique that makes it possible to obtain a natural photographed image which does not give a feeling of strangeness and emphasizes differences in brightness between bright stars and low-brightness stars, without depending on a photographic scene. In a case where photographing the starry sky, the number of bright spots is detected from a picked-up image, and image processing performed on the picked-up image is controlled to at least blurring processing or edge emphasis processing or neither the blurring processing nor the edge emphasis processing, according to the number of detected bright spots.

A manual controller commands a telescope mount to automatically track a specific bright star after the image of the star is located to center of an electronic eyepiece and a timer is started. The average moving speed of the bright star is calculated after a predetermined elapsed time to acquire the right ascension (RA) and the declination (DEC) coordinates of this bright star. Subsequently, the RA and DEC coordinates are compared with pre-stored data contained within a database used to identify the bright star. The celestial sphere coordinates of the telescope can be determined after a minimum of one bright star is identified. In the auto-tracking procedure, the manual controller controls movement of telescope by feedbacks of the drifting speed and direction of the specific bright star in an electronic eyepiece for the purpose of keeping the specific bright star in the center of the electronic eyepiece.

The invention relates to a method for selecting an observation triangle before star map matching. The method comprises the following steps: primarily selecting the observation triangle; performing second optimization screening on the observation triangle, wherein the screening conditions are that the minimum edge for forming the observation triangle on an image surface has more than dmin pixels, and the minimum included angle in the observation triangle on the image surface is larger than thetamin. Compared with the conventional method, the method for selecting the observation triangle before the star map matching can improve the 60.8% probability of one-time matching success and posture output, can preferentially select three groups of observation triangles consisting of brighter stars to recognize and verify in the practical engineering, namely having 77.5% probability to improve success rate of three times of matching and posturing, and greatly improves the time consistency of every frame of all day sphere posturing output.

The invention discloses black-snake beautifying oral liquid which is prepared from the slaughtered and eviscerated fresh zaocys dhumnades and traditional Chinese medicines such as reed rhizome, flavescent sophora root, figwort, honeysuckle flower, fructus cannabis, semen pruni, tetrandra root, hawthorn, pilose asiabell root, astragalus root, eucommia bark, angelica, wolferry fruit, crystal sugar and water. The black-snake beautifying oral liquid contains high protein, rich polypeptide and mineral elements for supplying essential nutrition for human body so as to promote and improve microcirculation, regulate gastrointestinal function, discharge toxin in human body timely and enhance immunity of human body. The black-snake beautifying oral liquid has functions of refreshing, keeping red lips and white teeth as well as graceful carriage, improving eyesight like bright star, strengthening voice and body, blackening hair and removing freckles, avoiding constipation and cold, promoting growth and development of teenagers, postponing epiphysial closure and prolonging growth cycle.

The invention relates to the technical field of ceramic tiles, and particularly discloses a glazed tile with a bright star effect on the surface and a preparation method of the glazed tile. The preparation method comprises the steps of applying ground glaze on a green brick, applying matte glaze, printing, applying bright star glaze and sintering; by adjusting the components and content of the matte glaze, the matte glaze forms a large number of glass phases, which is beneficial for forming a compact matte glaze layer; the high-sodium-content bright star glaze can remarkably reduce the melting temperature, the surface tension and the high-temperature viscosity of the bright star glaze, is matched with the matte glaze to enable the bright star glaze to be leveled in a matte glaze layer, is high in density, facilitates improvement of the antifouling property of the bright star glaze layer, and is low in cost and easy to popularize. The glaze surface of the fired glazed tile has the effect of sparkling star light, the flatness of the glaze surface is high, the glaze surface does not need to be polished, and the process is simple.

The invention relates to the field of measurement by vehicle-mounted measurement and control devices, and particularly relates to a precise north-seeking method to the north star for a vehicle-mounted measurement and control device. The method is an orientation zero degree comprehensive calibration method suitable for a situation that no reference azimuth mark or other fixed station exists round a vehicle-mounted measurement and control device station. By utilizing a characteristic that the north star is near the north pole, is a second-brightest star and is bright in the night sky, by correcting a light ray refraction error and by utilizing a circle solving formula, the orientation zero offset of a local antenna of the vehicle-mounted measurement and control device is acquired. By adopting the scheme mentioned above, arrangement of marks at fixed points around the device station is not needed, thus reducing manpower and material resources. The method is simple, convenient and reliable in measurement, facilitates equipment transferring, increases measurement precision, is suitable for the situation that no reference azimuth mark or other fixed station exists round the vehicle-mounted measurement and control device station, and has a wide application prospect.

The invention discloses black-snake beautifying oral liquid which is prepared from the slaughtered and eviscerated fresh zaocys dhumnades and traditional Chinese medicines such as reed rhizome, flavescent sophora root, figwort, honeysuckle flower, fructus cannabis, semen pruni, tetrandra root, hawthorn, pilose asiabell root, astragalus root, eucommia bark, angelica, wolferry fruit, crystal sugar and water. The black-snake beautifying oral liquid contains high protein, rich polypeptide and mineral elements for supplying essential nutrition for human body so as to promote and improve microcirculation, regulate gastrointestinal function, discharge toxin in human body timely and enhance immunity of human body. The black-snake beautifying oral liquid has functions of refreshing, keeping red lips and white teeth as well as graceful carriage, improving eyesight like bright star, strengthening voice and body, blackening hair and removing freckles, avoiding constipation and cold, promoting growth and development of teenagers, postponing epiphysial closure and prolonging growth cycle.

A technique that makes it possible to obtain a natural photographed image which does not give a feeling of strangeness and emphasizes differences in brightness between bright stars and low-brightness stars, without depending on a photographic scene. In a case where photographing the starry sky, the number of bright spots is detected from a picked-up image, and image processing performed on the picked-up image is controlled to at least blurring processing or edge emphasis processing or neither the blurring processing nor the edge emphasis processing, according to the number of detected bright spots.

The invention discloses a space debris detection method based on inertial space, which comprises the following working steps: image background estimation; astrology scanning and two-dimensional plane coordinate reduction; three-dimensional space vector reduction; background star elimination; space debris detection. The present invention abandons the process of relying on two-dimensional plane coordinates to meet a given threshold to eliminate star images, and only relies on the different motion rules of background stars and space debris astrology in inertial three-dimensional space (vectors of adjacent frame stars in inertial space basically coincide or their corresponding The right ascension and declination of the telescope are basically unchanged) and the astrology of background stars is eliminated, which realizes the detection of space debris in different observation modes of the telescope, and is especially suitable for the unstable situation of space debris tracking. According to the given detection threshold, the present invention can flexibly adopt multi-frame CCD images to detect non-stellar targets whose apparent motion speed is faster than that of stars, reduce detection false alarms caused by bright stars and other factors, and improve dim space debris. detection success rate.

A construction method of a star database of a triangle matching-type star sensor includes steps of: S1) determining basic cut-off magnitude and candidate cut-off magnitude; S2) rejecting peculiar stars; S3) performing fixed star proper motion compensation algorithm; S4) determining threshold of angular distances of neighboring fixed stars; S5) performing whole-celestial sphere helical line traversal; S6) determining relative bright stars; and S7) generating database of angular distances between stars.

The invention discloses an anti-sticking agent for melamine impregnated paper and a preparation method thereof. The anti-sticking agent for the melamine impregnated paper is prepared from the following components in parts by mass: 5 to 10 parts of diethylene glycol, 3 to 5 parts of a sodium hydroxide saturated solution, 8 to 12 parts of octanol polyoxyethylene ether, 6 to 10 parts of polyether, 10 to 15 parts of alkylphenol polyoxyethylene ether, 10 to 15 parts of isooctanol phosphate, 3 to 5 parts of alcohol ester, 0.3 to 0.5 part of a defoaming agent and 40 to 60 parts of water. By using anti-sticking agent disclosed by the invention in the melamine impregnated paper, not only can the melamine impregnated paper be difficult to stick and the storage period of the melamine impregnated paper be prolonged, but also the fluidity of paper glue on the melamine impregnated paper is increased, and the phenomena of bright stars and sand holes appearing during a pressing and sticking process are improved.

The invention relates to the field of measurement by vehicle-mounted measurement and control devices, and particularly relates to a precise north-seeking method to the north star for a vehicle-mounted measurement and control device. The method is an orientation zero degree comprehensive calibration method suitable for a situation that no reference azimuth mark or other fixed station exists round a vehicle-mounted measurement and control device station. By utilizing a characteristic that the north star is near the north pole, is a second-brightest star and is bright in the night sky, by correcting a light ray refraction error and by utilizing a circle solving formula, the orientation zero offset of a local antenna of the vehicle-mounted measurement and control device is acquired. By adopting the scheme mentioned above, arrangement of marks at fixed points around the device station is not needed, thus reducing manpower and material resources. The method is simple, convenient and reliable in measurement, facilitates equipment transferring, increases measurement precision, is suitable for the situation that no reference azimuth mark or other fixed station exists round the vehicle-mounted measurement and control device station, and has a wide application prospect.

The present invention discloses a multifunctional firework bright star granulation safety material preparing mechanism, wherein the material feeding mechanism comprises the transmission, material discharging, agent adding and dust removing system, the granulation feeding mechanism adopts the steel wire rope transmission and the pulley block transmission, the material vehicle uses the two wedge-shaped diversion material hoppers to sub-package the granular material and the powder material, uses the pneumatic butterfly valve as the flow rate control valve, and arranges the material hoppers on the electronic weighing device by using the floating type design, the agent adding and dust removing device respectively suck the additive and the water to the spraying nozzle positions through the water pump in two paths, one spraying nozzle is used for removing dust, and the other spraying nozzle is used for adding the additive. According to the present invention, the man-machine separation purpose is achieved, the safety of the operator is ensured, the control of the process is strengthened, the sealed treatment of the material is ensured and no material is leaked, and the dust removing device is arranged to reduce the generation of spark and static electricity so as to ensure the safety and the efficiency of the production.

An iterative traversal-based star sensor anti-stray light star point extraction method and device, the method randomly generates N windows in the whole image, calculates the mean value and threshold of each window, and uses the calculated window threshold in the window to pass the traversal Extraction of star points in the connected domain method; calculate the position coordinates of star points by the first-order centroid method, and store the energy information of each star point; sort the extracted valid star points by energy, retain the coordinates of the brightest n star points, and at the same time Randomly generate N-n window coordinates; use the above-mentioned reserved n star point coordinates and the randomly generated window coordinates for windowing of the next frame of star map; iteratively execute the above steps, and the star map can be extracted after multiple traversals middle N star the brightest star point, using the N star The star points are used for subsequent all-sky star map recognition and attitude calculation. The invention effectively solves the problem that the product cannot output an effective attitude quickly due to the interference of stray light in orbit, and significantly improves the anti-stray light capability of the star sensor in orbit.